Demountable rim



w. s. MARTIN.

DEMOUNTABLE RIM.

APPLICATION FILED MAR. 30, 1921.

1 ,396, 1 34;. Patented Nov. 8, 1921.

UNITED STATES PATENT OFFICE.

DEMOUNTABLE RIM.

Application filed March 30, 1921.

To all ham a mag concern:

Be it known that I, WVALTER SooTT MAR- TIN, a citizen of the UnitedStates, residing at Flint, in the county of Genesee and State ofMichigan, have invented certain new and useful Improvements inDemountable Rims,

of which the followingis a specification, reference being had to theaccompanying drawings.

It is the purpose of the present invention to provide a structure offelly made up of any suitable material either aluminium, iron, or steel,preferably the latter and including an expansible spring steel ring, andmeans for expanding the same, for holding a tire carrying rimdemountably thereon, said means for expanding the ring being operable,to expand the ring, or to permit the ring to contract, in holding therim demountably on the felly, and to permit the rim to be removed.

7 While the design and construction at present illustrated and set forthis deemed preferable, it is obvious that as a result of a reduction ofthe invention to a more practical form for commercial purposes, theinvention may be susceptible of changes, and the right to these changesis claimed, provided they are comprehended within the scope of what isclaimed.

The invention comprises further features and combination of parts, aswill be hereinafter set forth, shown in the drawings and claimed.

In the drawings Figure 1 is a view in elevation of a wheel felly showinga demountable rim including a tire thereon, as applied thereto.

Fig. 2 is a cross sectional view on line 22 of Fig. 1, showing the rimas being held on the felly by meansof the expansible ring, and anannular shoulder which is carried by the rim.

Fig. 3 is a detail sectional plan view on line 33 of Fig. 2, showing thetype of wedge or means for expanding the ring.

Fig. & is a detail perspective view of the wedge 8.

Fig. 5 is a detail expansible ring.

Fig. 6 is a detail sectional view of the felly and the demountable rim,showing a modified means for expanding the ring.

Fig. 7 is a sectional view on line 77 of Fig. 6.

perspective view of the Specification of Letters Patent.

wed

Patented Nov. 8, 1921. Serial No. 456,945.

Fig. 8 is a detail wedge or expanding opening 18.

Fig. 9 is a detail sectional view of a felly particularly for a wirewheel, showing another modified form of wedge for expanding theexpansible ring.

ig. 10 is a detail perspective view of the wedge of Fig. 9.

Referring to the drawings, 1 the felly, which may be constructed of anysuitable material either wood, aluminium, iron or steel preferably thelatter. This felly is of channel or U-shaped form in cross-section, oneside or flange 2 of which is of greater depth than the opposite side orflange 3. The flange or side of greater depth is deflected or bentlaterally from the felly, and is engaged by one side of the demountablerim 5. This rim 5 has the usual clencher flanges, to engage and supportthe usual form of tire 6.

The flange or side of less depth of the felly receives bolts 7, whichpass through the ges or ring expanding members 8. These ring expandingmembers or wedges rest upon the bottom of the U-shaped or channel felly,as indicated at 9, so as to prevent turning of the members or wedges.These members or wedges have inclined or curved faces 10, which camagainst the rounded corner 11 of the expansible and contractible ring12. This expansible ring has split ends 13, which are recessed andoverlapped. The ring is disposed against the perspective view of themember 18, showing its designates flange or side of less depth of thefelly.

Referring to Fig. 2 it will be seen that the heads 14 of the bolts areexposed on the interior of the channel of the. felly, while the nuts 16are adjacent the exterior face of the flange 3, therefore upontightening up of the nuts 16, drawing the bolts 7 in a lateraldirection, the inclined or rounded or curved faces 10 of the wedges willcontact with the rounded edge or corner of the ring 12, and

- cause the ring to expand against the rim 5,

so as to cooperate with the annular shoulder 17, to prevent lateraldisplacement of the rim.

In Fig. 6 the bolt passes through the flange of less depth, in factthrough the flange 3, and mounted on the bolt adjacent the flange 3 is amodified wedge or device for expanding the ring. This wedge or device 18is substantially rectangular with its corners slightly rounded, and itsopening 18 is also angular, to fit the shank of the bolt which iscorrespondingly shaped, so that the wedge or expanding device may rotatewith the bolt, to expand the ring. Though the shank of the bolt isangular or greater in bolts adjacent the outer surface of the flange 3may be rotated, which will in turn rotate the wedges 18 and expand thering. When the expanding members or wedges are rotated, their greaterlength becomes disposed radially and causes the ring to be forcedradially against the rim holding the same in position. The rim has anannular shoulder 17 which is disposed inwardly of th ring, thereforewhen the ring is expanded, it is obvious that the ring will be of adiameter greater than the diameter of the annular shoulder of the ring,thereby preventing the rim from being removed. When the bolts areloosened by imparting a quarter turn to them, the wedges or expandingmembers 18 become disposed, so that their width becomes disposedradially, the ring will contract sufficiently out of contact with therim, to permit the shoulder 17 to easily pass over the expansible ringand the flange 8, thereby allowing th rim to be removed.

In Fig. 8 another form of wedge 19 is employed especially. in connectionwith wire wheels, and is mounted upon the bottom of the channel of thefelly instead of adjacent the side flange. Obviously by adjusting thebolt 21 (the shank 20 of which is angular in cross section where itengages through the wedge 19), the inclined beveled face or cam 22 willengage under the rounded edge of the ring, and raise the ringto expandagainst the rim.

In order to insure holding the ring 12 in place, particularly in Figs. 6and 7 angle plates 12, as shown in Fig. 7 may be riveted as at 12 to theflange of the rim. These angle plates 12 prevent lateral movement of thering. 7

Ihe invention having been set forth, what is claimed as being usefulis 1. In a device for the purpose indicated, a felly of substantiallyU-form in cross section and provided with a rim retaining abutmentflange, an expansible ring engaged with the inner face of the oppositeradial flange of the felly and adapted to outwardly in contact with therim, wedges mounted upon the interior cylindrical wall of the U-formfelly and having means to cam against the expansible ring, for expandingthe same radially, a rim telescoped over the felly, and against whichthe ring expands and frictionally engages, thereby frictionallyretaining the rim on the felly.

2. In a device for the purpose indicated, a felly ofsubstantially'U-form in cross section and provided with a rim retaining abutmentflange, an expansible ring engaged with the inner face of the oppositeradial flangeof the felly and adapted to be forced radially outwardly incontact with the rim, wedges mounted upon the interior cylindrical wallof the U-form felly and having means to cam against the expansible ring,for expanding the same radially, a rim telescoped over the felly, andagainst which the ring expands and frictionally engages, therebyfrictionally retaining the rim on the folly, said rim having anannularly disposed shoulder with which the expansible ring engages,thereby insuring holding the rim on the felly.

In testimony whereof I hereunto affix my signature.

WALTERSCOTT MARTIN.

be forced radially

